Grinding-disk.



Patented May 4, 1915.

F. L. MCKILLIP- GRINDING DISK.-

1 ION FILED SEPT-6,19I3

W] T [V5555 5 NTTED STATES PATN FRANK L. McKlZLLIP, or GREEN BAY, WISCONSIN, ASSIGNOR TO THE ur-ro-nn'rn MACHINE COMPANY, or GREEN BAY, Wisconsin, A CORPORATION or WISCONSIN.

shimmer-DISK.

Specification of Letters Patent.

Patented May 4, 1915.

To all whom it may concern.

Be it known that I, FRANK L. MQKILLIP, a citizen of the United States, residing at Green Bay, in the county of Brown and State of Wisconsin, have invented new and useful Grinding-Disks, of which the following is a specification. 1

My invention relates to a pairof grinding disks, to be cast of a suitable metal,'one of the pair to be held stationary and the other mounted upon a shaft for revolution, the disks being circular and of like dimensions, and of the same form, excepting in the number of concentric grooves in their grinding faces, a series of such grooves being an element in the formation of said faces, which with a series of radial and tangential grooves form teeth which intermesh in grinding. All of the concentric grooves in one disk of the pair are staggered relative to the concentric grooves of the other disk of the pair, that is, they are half the distance from one groove to the groove of next smaller diameter, nearer the center of that disk, than the next groove of larger diameter in the other disk, so that the pyramidal teeth which the concentric grooves and the tangential and radial grooves form in one disk will run between like teeth in the other disk of the pair, instead of the points of their teeth being in the concentric rows of like diameter in each disk, and the object of the invention is, to arrange the teeth in the two disks of the pair which run face to face, so that they will tend to sharpen each other in running, with one row of teeth in one disk between two rows in the other disk, instead of the points of the teeth in one disk running against the points of the, teeth in the other disk, as is the case where the radial position of the teeth is the same in both disks, and also to provide pockets around the inside of the grinding surface of the disk for receiving the material to be ground, of such a position therein and of such form as will force said material outward into the transverse grooves and increase the capacity of the grinding.

My invention is shown in the accompanying drawing, in which, Figure 1 is a plan of one disk. Fig. 2 is a plan of a disk designed to run with the disk shown in Fig. 1 for completing the pair. Fig. 8 is an edge View in section of half of the two disks with their grinding faces arranged to intermesh as in grinding. Fig. 4 is a section of a part of one of the circumferential rows of teeth in one of the disks. Fig. 5 is a section across the disk upon the line a, a, of Fig. 1, showing the rear side of the teeth. Fig. 6 is a section across one half of the two disks upon the lines I), Y), of F igs, 1 and 2, the grinding faces being represented as straight lines, and showing a slight concavity in. said faces. Figs. '3, a and 5, are upon a larger scale than the others.

Similar numerals indicate like parts in the several views.

1 and 2, indicate grinding disks in Figs. 1 and 2 respectively, and which are alike in dimensions and in their form and construction excepting as before stated, in that one disk contains one more concentric groove than the other, whereby, while the outside row of teeth in Fig. l are full size, the outside row in Fig. 2 are but half size, Fig. 2, as before remarked, being indentical with Fig. 1 excepting in the number of concentric grooves. The ority of the teeth in Fig. 2 have not been provided with lines for indicating the rear corners of the teeth as it was not deemed essential to a clear understanding of the invention. Each disk is divided into lands 3, and a pocket 4:, is provided for each land, the number of which lands in any pair of disks is immaterial, but they should be the same in the two disks of a pair to be used together. The pockets 4:, extend from the eye 5, about half way to the outer edge of the lands, and the inside and one end wall of each pocket are curved from end to end, and they are curved transversely of the pockets as is shown in Fig. 3. The other ends of the pockets are abrupt in a direction parallel with the axis of the disk and are arranged tangentially from the eye outward, the tangential lines of which are upon a circle of less diameter than that of the eye of the disks, and forming sectoral lands having ends bounded by tangential lines 6. Each land is provided with concentric grooves 7 and also, with tangentially arranged radial direction at 9, intermediate the last tangential line'of grooves, but nearer the wider portion of the lands. The circumferential grooves are V shaped, with the sides of the V at about the same angle relative to the face of the disk, but the radial and tangential grooves have that side toward grooves 8, which reach a the Widest end of its'land, in planes parallel with the axis of the disk, with a leaning toward the body of the teeth of approximately 10 degrees withsaid axis, as is shown at 10, in Fig. 3, and their rear sides 11 in planes arranged at an angle of degrees with their front, or cutting sides.

It should be understood that I do not con-- fine the angles of the teeth surfaces to any to be ground through the eyes of the disks in a usual manner. 12, indicates a flange around each disk and 13, holes through the flanges by which they may be secured in position for grinding.

Having described my invention, what I claim and desire to secure by Letters Patent, is,+

In grinding disks of a ring form, one of which is to be approximately 60 stationary and the other reof a curved cross section and a curved outline outside thereof and ending in an abrupt abutment tangentially arranged, said tangential abutment lines continuing outwardly and dividing the disk into a plurality of lands with their surfaces made slightly dished, a series of concentric grooves around the disk over said lands, the series in one disk of a pair being staggered relative to those in the other, a series of grooves arranged transversely of said concentric grooves, one of those nearly midway between the abutment tangential lines being radial and those each side of said radial line approaching gradually, the same tangential line as said abutment lines, whereby the material as fed from the several pockets is forced between teeth that continually present a different angle to each other from the entrance of the material from a pocket to its escape at the circumference of the disks and becomes finely ground.

FRANK L. MoKILLIP. Witnesses A. BRINGENER,

J. S. ARMSTRONG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. V 

